An aircraft or other vehicle in which a stream of air taken in from the surrounding atmosphere is passed through a duct to cool the cooling surfaces placed therein of the engine and in which stream a conversion of energy into pressure takes place before the cooling surfaces arc reached and a conversion of pressure into kinetic energy of the stream at its discharge is raised by transferring to the stream waste heat from the engine at a position behind the cooling surfaces and before further loss of pressure is sustained beyond that involved in passing the stream over the cooling surfaces. The above means are adapted to assist propulsion. In one form, an engine a is mounted in a wing b. Engine radiators bl, b2 are mounted in ducts b3, b1 the leading edges of which are in front or behind the leading edge of the wing. Exhaust manifolds c, c1 are provided with fins c0 and are mounted in the ducts to heat the stream. Hinged flaps c3 are provided at the rear of the ducts. In a modification the duct is situated beneath an engine disposed at the front end of the fuselage and a fan forces air through the duct. The invention may be applied to aircooled engines. Specification 447,283 is referred to.
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Apr 1, 1937
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